You have a list of objects that you want to sort using LINQ. You want to sort by a primary and secondary key from the fields (properties or members) of the object. How do you do this? The answer is to do two sorts. The first by the secondary key and the second by the primary key. Here's a little test...
Continue reading "LINQ secondary sort using extension method syntax"
Here's something that's caught me out a couple of times in the past so I'm documenting it to remind myself. My web page has a submit <input> tag that looks like this: <input type="submit" value="Create" /> I want to do some client side validation before I POST the page...
Continue reading "HTML Submit button still submits even when JavaScript returns false"
After doing some analysis using Google's web master tools I discovered that I needed to make some improvements to how the CSS file(s) on a busy site were being delivered. This post follows on from and improves on Automatically keeping CSS file current on any web page . The CSS files need to be combined...
Continue reading "Combine, compress, and update your CSS file in ASP.NET MVC"
Just started reading Ultra-Fast ASP.NET by Richard Kiessig (Build Ultra-Fast and Ultra-Scalable web sites using ASP.NET and SQL Server). So far very good. Will post more here. Richard Kiessig on twitter: http://twitter.com/UltraFastASPNET...
Continue reading "Ultra-Fast ASP.NET"
The problem: You update your site's CSS file but your users aren't seeing your latest crazy colors and styles that you've selected for your web site. The reason: Your users' browsers have cached the CSS files and it could take days before those caches expire and your new CSS file is requested from your...
Continue reading "Automatically keeping CSS file current on any web page"
I've been researching a jQuery drag and drop tree plugin for a project that I'm working on and so far I've found the following: 1. jsTree So far this is my favorite. It does almost everything that I want including in place editing of the tree items. One drawback is that it itself requires a ton of plugins...
Continue reading "jQuery drag and drop tree plugin"
Great post by Chris Eargle about a null coalescing assignment operator for c# . How would you like to be able to say: myObj ??= new MyObj(); instead of: myObj = myObj ?? new MyObj(); Seems like a trivial "enhancement" to the language but makes sense to me....
Continue reading "Null Coalescing Assignment Operator for C#"
I've just learned about the [Flags] attribute for enums. I'm surprised that I hadn't stumbled across it before. Consider the following code snippet: enum Direction { North = 1, East = 2, South = 4, West = 8 } static void EnumTesting() { Direction ne = Direction.North | Direction.East; Console.WriteLine...
Continue reading "Flags enum attribute"
I was recently involved in a discussion about IP addresses and discovered that not everyone understands an IP address. I was told that an IP address is not an integer. Well, it is an integer, a 32-bit integer, but it is rarely represented as such. It is usually represented as four octets joined together...
Continue reading "Managing IP addresses as integers"
I often need to convert a string IP to an Int32 and then back again. To facilitate converting an Int32 to its string representation I have added this extension method to my IntExtensions class in C#: public static class IntExtensions { /// <summary> /// Converts an integer that represents an IPv4...
Continue reading "Converting a string IP to an int and back"